3 files changed, 11 insertions, 4 deletions

diff --git a/modules/gridmap/doc_classes/GridMap.xml b/modules/gridmap/doc_classes/GridMap.xml
index 0f3662c3cf..bd5c938364 100644
--- a/modules/gridmap/doc_classes/GridMap.xml
+++ b/modules/gridmap/doc_classes/GridMap.xml
@@ -25,12 +25,14 @@
 		<method name="clear_baked_meshes">
 			<return type="void" />
 			<description>
+				Clears all baked meshes. See [method make_baked_meshes].
 			</description>
 		</method>
 		<method name="get_bake_mesh_instance">
 			<return type="RID" />
 			<param index="0" name="idx" type="int" />
 			<description>
+				Returns [RID] of a baked mesh with the given [param idx].
 			</description>
 		</method>
 		<method name="get_bake_meshes">
@@ -133,6 +135,7 @@
 			<param index="0" name="gen_lightmap_uv" type="bool" default="false" />
 			<param index="1" name="lightmap_uv_texel_size" type="float" default="0.1" />
 			<description>
+				Bakes lightmap data for all meshes in the assigned [MeshLibrary].
 			</description>
 		</method>
 		<method name="map_to_local" qualifiers="const">
@@ -146,6 +149,7 @@
 			<return type="void" />
 			<param index="0" name="resource" type="Resource" />
 			<description>
+				Notifies the [GridMap] about changed resource and recreates octant data.
 			</description>
 		</method>
 		<method name="set_cell_item">
diff --git a/modules/gridmap/editor/grid_map_editor_plugin.cpp b/modules/gridmap/editor/grid_map_editor_plugin.cpp
index 9c6cbebf0e..89ef9ddd90 100644
--- a/modules/gridmap/editor/grid_map_editor_plugin.cpp
+++ b/modules/gridmap/editor/grid_map_editor_plugin.cpp
@@ -40,6 +40,8 @@
 #include "editor/editor_undo_redo_manager.h"
 #include "editor/plugins/node_3d_editor_plugin.h"
 #include "scene/3d/camera_3d.h"
+#include "scene/gui/menu_button.h"
+#include "scene/gui/separator.h"
 #include "scene/main/window.h"
 
 void GridMapEditor::_node_removed(Node *p_node) {
@@ -459,6 +461,7 @@ void GridMapEditor::_delete_selection() {
 		return;
 	}
 
+	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
 	undo_redo->create_action(TTR("GridMap Delete Selection"));
 	for (int i = selection.begin.x; i <= selection.end.x; i++) {
 		for (int j = selection.begin.y; j <= selection.end.y; j++) {
@@ -479,6 +482,7 @@ void GridMapEditor::_fill_selection() {
 		return;
 	}
 
+	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
 	undo_redo->create_action(TTR("GridMap Fill Selection"));
 	for (int i = selection.begin.x; i <= selection.end.x; i++) {
 		for (int j = selection.begin.y; j <= selection.end.y; j++) {
@@ -572,6 +576,7 @@ void GridMapEditor::_do_paste() {
 	rot = node->get_basis_with_orthogonal_index(paste_indicator.orientation);
 
 	Vector3 ofs = paste_indicator.current - paste_indicator.click;
+	Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
 	undo_redo->create_action(TTR("GridMap Paste Selection"));
 
 	for (const ClipboardItem &item : clipboard_items) {
@@ -659,6 +664,7 @@ EditorPlugin::AfterGUIInput GridMapEditor::forward_spatial_input_event(Camera3D
 		} else {
 			if ((mb->get_button_index() == MouseButton::RIGHT && input_action == INPUT_ERASE) || (mb->get_button_index() == MouseButton::LEFT && input_action == INPUT_PAINT)) {
 				if (set_items.size()) {
+					Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
 					undo_redo->create_action(TTR("GridMap Paint"));
 					for (const SetItem &si : set_items) {
 						undo_redo->add_do_method(node, "set_cell_item", si.position, si.new_value, si.new_orientation);
@@ -680,6 +686,7 @@ EditorPlugin::AfterGUIInput GridMapEditor::forward_spatial_input_event(Camera3D
 			}
 
 			if (mb->get_button_index() == MouseButton::LEFT && input_action == INPUT_SELECT) {
+				Ref<EditorUndoRedoManager> &undo_redo = EditorNode::get_undo_redo();
 				undo_redo->create_action(TTR("GridMap Selection"));
 				undo_redo->add_do_method(this, "_set_selection", selection.active, selection.begin, selection.end);
 				undo_redo->add_undo_method(this, "_set_selection", last_selection.active, last_selection.begin, last_selection.end);
@@ -1142,8 +1149,6 @@ void GridMapEditor::_bind_methods() {
 }
 
 GridMapEditor::GridMapEditor() {
-	undo_redo = EditorNode::get_singleton()->get_undo_redo();
-
 	int mw = EDITOR_DEF("editors/grid_map/palette_min_width", 230);
 	Control *ec = memnew(Control);
 	ec->set_custom_minimum_size(Size2(mw, 0) * EDSCALE);
diff --git a/modules/gridmap/editor/grid_map_editor_plugin.h b/modules/gridmap/editor/grid_map_editor_plugin.h
index 91f14690ca..1cf2e4cb89 100644
--- a/modules/gridmap/editor/grid_map_editor_plugin.h
+++ b/modules/gridmap/editor/grid_map_editor_plugin.h
@@ -41,7 +41,6 @@
 #include "scene/gui/spin_box.h"
 
 class ConfirmationDialog;
-class EditorUndoRedoManager;
 class MenuButton;
 class Node3DEditorPlugin;
 
@@ -66,7 +65,6 @@ class GridMapEditor : public VBoxContainer {
 		DISPLAY_LIST
 	};
 
-	Ref<EditorUndoRedoManager> undo_redo;
 	InputAction input_action = INPUT_NONE;
 	Panel *panel = nullptr;
 	MenuButton *options = nullptr;